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Paul Hobson

Captain Paul Hobson was an antinomian Particular Baptist who served in the parliamentary army during the English Civil War... Read More

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49 49

G64.5+0.9, a new shell supernova remnant with unusual central emission

Sep 23, 2013 09/13

by AMI Consortium; :; Natasha Hurley-Walker; Matthew L. Davies; Thomas M. O. Franzen; Keith Grainge; D. A. Green; Michael P. Hobson; Anthony Lasenby; Guy Pooley; Carmen Rodríguez-Gonzálvez; Richard D. E. Saunders; A. M. M. Scaife; Paul F. Scott; Timothy Shimwell; David Titterington; Elizabeth Waldram; Jonathan T. L. Zwart

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We present observations between 1.4 and 18 GHz confirming that G64.5+0.9 is new Galactic shell supernova remnant, using the Very Large Array and the Arcminute Microkelvin Imager. The remnant is a shell ~8 arcmin in diameter with a spectral index of alpha = 0.47 +/- 0.03 (with alpha defined such that flux density S varies with frequency nu as S proportional to nu to the power of -alpha). There is also emission near the centre of the shell, ~1 arcmin in extent, with a spectral index of alpha =...
Source: http://arxiv.org/abs/0903.4317v1

Alumni Voices

2 2.0

Director of Modern Art Oxford, Paul Hobson (Brasenose, 1988)

Dec 30, 2019 12/19

by Paul Hobson

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Director of Modern Art Oxford, Paul Hobson, shares his experiences studying Modern History at Brasenose College and talks about how he transitioned into a career in contemporary art. Director of Modern Art Oxford, Paul Hobson, shares his experiences studying Modern History at Brasenose College and talks about how he transitioned into a career in contemporary art. As well as reading Modern History at Oxford University, Paul also completed post-graduate studies in aesthetics and contemporary...

Books to Borrow

9 9.0

Efficiency and the local public sector

Jul 16, 2019 07/19

by Hobson, Paul Alexander Robert, 1953-

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47 p. ; 23 cm
Topics: Local government -- Canada, Provincial-local fiscal relations -- Canada, Provincial-local relations...

Books to Borrow

1 1.0

On the form of the locational efficiency condition in local public goods models

Aug 7, 2019 08/19

by Hobson, Paul A. R. (Paul Alexander Robert), 1953-

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9 pages ; 28 cm
Topics: Public goods -- Mathematical models, Local finance -- Mathematical models, Local finance --...

Books to Borrow

13 13

Industrial lubrication practice

Aug 3, 2017 08/17

by Hobson, Paul D., 1921-

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Topics: Lubrication and lubricants, Lubrication and lubricants, Teoria Da Lubrificacao

Books to Borrow

121 121

The sea : voyages, mysteries, discoveries, disasters. How much do we know?

Nov 4, 2011 11/11

by Jack, Ian, 1945- edt; Hamilton-Paterson, James. Sea burial; Jack, Ian, 1945- Serendip; Rosie, George. Northern light; Pamuk, Orhan, 1952- Boy who watched the ships go by; Gaumy, Jean. Hunters; Webster, Justin, 1963- Piratas; Nicholl, Charles. Conversations with a giant; Theroux, Paul. Unspeakable rituals; Blackburn, Julia. Mermaid; Scammell, William, 1939- Sea pictures; Bathurst, Bella. Sea pictures; Ascherson, Neal. Sea pictures; Rodger, N. A. M., 1949- Sea pictures; Hobson, Will. Sea pictures; Ackerman, Michael, 1967- New York waterfront; Marsden, Philip, 1961- Waiting for St. Petersburg; Gill, Stephen, 1971- Scotland's last great artefact; Murakami, Haruki, 1949- Seventh man; Drewe, Robert, 1943- News shark; Biguenet, John. And never come up

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Cover title
Topic: Ocean

Arxiv.org

37 37

Cosmological parameter estimation using Very Small Array data out to l=1500

Sep 21, 2013 09/13

by Rafael Rebolo; Richard A. Battye; Pedro Carreira; Kieran Cleary; Rod D. Davies; Richard J. Davis; Clive Dickinson; Ricardo Genova-Santos; Keith Grainge; Carlos M. Gutirrez; Yaser A. Hafez; Michael P. Hobson; Michael E. Jones; Rudiger Kneissl; Katy Lancaster; Anthony Lasenby; J. P. Leahy; Klaus Maisinger; Guy G. Pooley; Nutan Rajguru; Jose Alberto Rubino-Martin; Richard D. E. Saunders; Richard S. Savage; Anna Scaife; Paul F. Scott; Anze Slosar; Pedro Sosa Molina; Angela C. Taylor; David Titterington; Elizabeth Waldram; Robert A. Watson; Althea Wilkinson

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We estimate cosmological parameters using data obtained by the Very Small Array (VSA) in its extended configuration, in conjunction with a variety of other CMB data and external priors. Within the flat $\Lambda$CDM model, we find that the inclusion of high resolution data from the VSA modifies the limits on the cosmological parameters as compared to those suggested by WMAP alone, while still remaining compatible with their estimates. We find that $\Omega_{\rm b}h^2=0.0234^{+0.0012}_{-0.0014}$,...
Source: http://arxiv.org/abs/astro-ph/0402466v2

Album Recordings

11 11

Flight Log 1966-1976

Jan 25, 2021 01/21

by Jefferson Airplane; David Freiberg; Grace Slick; Hot Tuna; Jefferson Starship; Jorma Kaukonen; Paul Kantner; Tom Hobson

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Tracklist: Disc 1: 1. Come Up The Years 2. White Rabbit 3. Comin' Back To Me 4. Won't You Try Saturday Afternoon 5. Greasy Heart 6. If You Feel 7. Somebody To Love (Live) 8. Wooden Ships 9. Volunteers 10. Hesitation Blues (Traditional) - Hot Tuna 11. Have You Seen The Stars Tonite - Paul Kantner; Jefferson Starship Disc 2: 1. Silver Spoon - Grace Slick; Paul Kantner 2. Feel So Good 3. Pretty As You Feel 4. Milk Train 5. Ja Da (Keep On Truckin') - Hot Tuna 6. ¿Come Again? Toucan - Grace Slick...
Topics: Rock, Folk Rock, Rock & Roll, Psychedelic Rock
Source: Vinyl LP

Arxiv.org

3 3.0

Bayesian estimation of non-Gaussianity in pulsar timing analysis

Jun 30, 2018 06/18

by Lindley Lentati; Michael P. Hobson; Paul Alexander

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We introduce a method for performing a robust Bayesian analysis of non-Gaussianity present in pulsar timing data, simultaneously with the pulsar timing model, and additional stochastic parameters such as those describing red spin noise and dispersion measure variations. The parameters used to define the presence of non-Gaussianity are zero for Gaussian processes, giving a simple method of defining the strength of non-Gaussian behaviour. We use simulations to show that assuming Gaussian...
Topics: Instrumentation and Methods for Astrophysics, Astrophysics
Source: http://arxiv.org/abs/1405.2460

Arxiv.org

59 59

Estimating the bispectrum of the Very Small Array data

Sep 18, 2013 09/13

by Sarah Smith; Graca Rocha; Anthony Challinor; Richard A. Battye; Pedro Carreira; Kieran Cleary; Rod D. Davies; Richard J. Davis; Clive Dickinson; Ricardo Genova-Santos; Keith Grainge; Carlos M. Gutierrez; Yaser A. Hafez; Michael P. Hobson; Michael E. Jones; Rudiger Kneissl; Katy Lancaster; Anthony Lasenby; J. P. Leahy; Klaus Maisinger; Guy G. Pooley; Nutan Rajguru; Rafael Rebolo; Jose Alberto Rubino-Martin; Pedro Sosa Molina; Richard D. E. Saunders; Richard S. Savage; Paul Scott; Anze Slosar; Angela C. Taylor; David Titterington; Elizabeth Waldram; Robert A. Watson

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We estimate the bispectrum of the Very Small Array data from the compact and extended configuration observations released in December 2002, and compare our results to those obtained from Gaussian simulations. There is a slight excess of large bispectrum values for two individual fields, but this does not appear when the fields are combined. Given our expected level of residual point sources, we do not expect these to be the source of the discrepancy. Using the compact configuration data, we put...
Source: http://arxiv.org/abs/astro-ph/0401618v2

Arxiv.org

43 43

The CMB power spectrum out to l=1400 measured by the VSA

Sep 18, 2013 09/13

by Keith Grainge; Pedro Carreira; Kieran Cleary; Rod D. Davies; Richard J. Davis; Clive Dickinson; Ricardo Genova-Santos; Carlos M. Gutierrez; Yaser A. Hafez; Michael P. Hobson; Michael E. Jones; Rudiger Kneissl; Katy Lancaster; Anthony Lasenby; J. P. Leahy; Klaus Maisinger; Guy G. Pooley; Rafael Rebolo; Jose Alberto Rubino-Martin; Pedro Sosa Molina; Carolina Odman; Ben Rusholme; Richard D. E. Saunders; Richard Savage; Paul F. Scott; Anze Slosar; Angela C. Taylor; David Titterington; Elizabeth Waldram; Robert A. Watson; Althea Wilkinson

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We have observed the cosmic microwave background (CMB) in three regions of sky using the Very Small Array (VSA) in an extended configuration with antennas of beamwidth 2 degrees at 34 GHz. Combined with data from previous VSA observations using a more compact array with larger beamwidth, we measure the power spectrum of the primordial CMB anisotropies between angular multipoles l = 160 - 1400. Such measurements at high l are vital for breaking degeneracies in parameter estimation from the CMB...
Source: http://arxiv.org/abs/astro-ph/0212495v2

Arxiv.org

65 65

Microwave observations of spinning dust emission in NGC6946

Sep 22, 2013 09/13

by Anna M. M. Scaife; Bojan Nikolic; David A. Green; Rainer Beck; Matthew L. Davies; Thomas M. O. Franzen; Keith J. B. Grainge; Michael P. Hobson; Natasha Hurley-Walker; Anthony N. Lasenby; Malak Olamaie; Guy G. Pooley; Carmen Rodriguez-Gonzalvez; Richard D. E. Saunders; Paul F. Scott; Timothy W. Shimwell; David J. Titterington; Elizabeth M. Waldram; Jonathan T. L. Zwart

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We report new cm-wave measurements at five frequencies between 15 and 18GHz of the continuum emission from the reportedly anomalous "region 4" of the nearby galaxy NGC6946. We find that the emission in this frequency range is significantly in excess of that measured at 8.5GHz, but has a spectrum from 15-18GHz consistent with optically thin free-free emission from a compact HII region. In combination with previously published data we fit four emission models containing different...
Source: http://arxiv.org/abs/1004.4897v1

Arxiv.org

30 30

Sunyaev-Zel'dovich observations of galaxy clusters out to the virial radius with the Arcminute Microkelvin Imager

Sep 21, 2013 09/13

by Jonathan T. L. Zwart; Farhan Feroz; Matthew L. Davies; Thomas M. O. Franzen; Keith J. B. Grainge; Michael P. Hobson; Natasha Hurley-Walker; Ruediger Kneissl; Anthony N. Lasenby; Malak Olamaie; Guy G. Pooley; Carmen Rodriguez-Gonzalvez; Richard D. E. Saunders; Anna M. M. Scaife; Paul F. Scott; Timothy W. Shimwell; David J. Titterington; Elizabeth M. Waldram

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We present observations using the Small Array of the Arcminute Microkelvin Imager (AMI; 14-18 GHz) of four Abell and three MACS clusters spanning 0.171-0.686 in redshift. We detect Sunyaev-Zel'dovich (SZ) signals in five of these without any attempt at source subtraction, although strong source contamination is present. With radio-source measurements from high-resolution observations, and under the assumptions of spherical $\beta$-model, isothermality and hydrostatic equilibrium, a Bayesian...
Source: http://arxiv.org/abs/1008.0443v2

Arxiv.org

4 4.0

Bayesian power spectrum estimation at the Epoch of Reionization

Jun 30, 2018 06/18

by Lindley Lentati; Peter H. Sims; Chris Carilli; Michael P. Hobson; Paul Alexander; Paul Sutter

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We introduce a new method for performing robust Bayesian estimation of the three-dimensional spatial power spectrum at the Epoch of Reionization (EoR), from interferometric observations. The versatility of this technique allows us to present two approaches. First, when the observations span only a small number of independent spatial frequencies ($k$-modes) we sample directly from the spherical power spectrum coefficients that describe the EoR signal realisation. Secondly, when the number of...
Topics: Cosmology and Nongalactic Astrophysics, Instrumentation and Methods for Astrophysics, Astrophysics
Source: http://arxiv.org/abs/1701.03384

Arxiv.org

43 43

A VSA search for the extended Sunyaev-Zel'dovich Effect in the Corona Borealis Supercluster

Sep 19, 2013 09/13

by Ricardo Genova-Santos; Jose Alberto Rubino-Martin; Rafael Rebolo; Kieran Cleary; Rod D. Davies; Richard J. Davis; Clive Dickinson; Nelson Falcon; Keith Grainge; Carlos M. Gutierrez; Michael P. Hobson; Michael E. Jones; Ruediger Kneissl; Katy Lancaster; Carmen P. Padilla-Torres; Richard D. E. Saunders; Paul F. Scott; Angela C. Taylor; Robert A. Watson

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We present interferometric imaging at 33 GHz of the Corona Borealis supercluster, using the extended configuration of the Very Small Array. A total area of 24 deg^2 has been imaged, with an angular resolution of 11 arcmin and a sensitivity of 12 mJy/beam. The aim of these observations is to search for Sunyaev-Zel'dovich (SZ) detections from known clusters of galaxies in this supercluster and for a possible extended SZ decrement due to diffuse warm/hot gas in the intercluster medium. We measure...
Source: http://arxiv.org/abs/astro-ph/0507285v1

Arxiv.org

48 48

AMI-LA radio continuum observations of Spitzer c2d small clouds and cores: Perseus region

Sep 22, 2013 09/13

by Anna M. M. Scaife; Jennifer Hatchell; Matthew Davies; Thomas M. O. Franzen; Keith J. B. Grainge; Michael P. Hobson; Natasha Hurley-Walker; Anthony N. Lasenby; Malak Olamaie; Yvette C. Perrott; Guy G. Pooley; Carmen Rodríguez-Gonzálvez; Richard D. E. Saunders; Michel P. Schammel; Paul F. Scott; Timothy Shimwell; David Titterington; Elizabeth Waldram

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We present deep radio continuum observations of the cores identified as deeply embedded young stellar objects in the Perseus molecular cloud by the Spitzer c2d programme at a wavelength of 1.8 cm with the Arcminute Microkelvin Imager Large Array (AMI-LA). We detect 72% of Class 0 objects from this sample and 31% of Class I objects. No starless cores are detected. We use the flux densities measured from these data to improve constraints on the correlations between radio luminosity and bolometric...
Source: http://arxiv.org/abs/1101.5514v2

Audiophile CD Collection

43 43

Something for Everybody

Mar 14, 2018 03/18

by Baz Luhrmann; Bazmark; Christine Anu; David Hobson; Doris Day; Gavin Friday; Gustav Holst; Helena; Jack Hylton & His Orchestra; John Paul Young; Kym Mazelle; Lani; Quindon Tarver; Royce Doherty; Snooper; Stanley Black; Tara Morice

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Tracklist: 1. Bazmark Fanfare - Bazmark 2. Young Hearts Run Free (The Overture mix) - Kym Mazelle 3. Lovefool (Snooper version) - Snooper 4. Perhaps Perhaps Perhaps - Doris Day 5. Everybody’s Free (to Wear Sunscreen) Mix - Quindon Tarver 6. Che Gelida Manina (Your Tiny Hand Is Frozen) - David Hobson 7. When Doves Cry (extended mix) - Quindon Tarver 8. Love Is in the Air (Fran mix) - John Paul Young 9. NUTBOD (Houseboats of Kashmir mix) - Christine Anu; Royce Doherty 10. Happy Feet (High Heels...
Source: CD

Arxiv.org

31 31

10C Survey of Radio Sources at 15.7 GHz: I - Observing, mapping and source extraction

Sep 23, 2013 09/13

by Thomas M. O. Franzen; Matthew L. Davies; Elizabeth M. Waldram; Keith J. B. Grainge; Michael P. Hobson; Natasha Hurley-Walker; Anthony Lasenby; Malak Olamaie; Guy G. Pooley; Carmen Rodriguez-Gonzalvez; Richard D. E. Saunders; Anna M. M. Scaife; Michel P. Schammel; Paul F. Scott; Timothy W. Shimwell; David J. Titterington; Jonathan T. L. Zwart

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We have observed an area of approximatley 27 deg^2 to an rms noise level of less than 0.2 mJy at 15.7 GHz, using the Arcminute Microkelvin Imager Large Array. These observations constitute the most sensitive radio-source survey of any extent (greater than approximately 0.2 deg^2) above 1.4 GHz. This paper presents the techniques employed for observing, mapping and source extraction. We have used a systematic procedure for extracting information and producing source catalogues, from maps with...
Source: http://arxiv.org/abs/1012.3711v2

Audiophile CD Collection

66 66

Something For Everybody

Dec 21, 2017 12/17

by Baz Luhrmann; Christine Anu; David Hobson; Doris Day; Gavin Friday; Gustav Holst; Helena; Jack Hylton; John Paul Young; Kym Mazelle; Lani; Quindon Tarver; Royce Doherty; Snooper; Stanley Black; Tara Morice; The Australian Opera and Ballet Orchestra

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Tracklist: 1. Bazmark Fanfare - Kym Mazelle 2. Young Hearts Run Free (The Overture mix) - Kym Mazelle 3. Lovefool (Snooper version) - Snooper 4. Perhaps, Perhaps, Perhaps - Doris Day 5. Time After Time (The S.F.E. version) - Tara Morice 6. Che Gelida Manina (Your Tiny Hand Is Frozen) - David Hobson; The Australian Opera and Ballet Orchestra 7. When Doves Cry (extended mix) - Quindon Tarver 8. Love Is in the Air (Fran mix) - John Paul Young 9. NUTBOD (Houseboats of Kashmir mix) - Christine Anu;...
Source: CD

Arxiv.org

37 37

AMI Large Array radio continuum observations of Spitzer c2d small clouds and cores

Sep 19, 2013 09/13

by Anna M. M. Scaife; Emily I. Curtis; Matthew Davies; Thomas M. O. Franzen; Keith J. B. Grainge; Michael P. Hobson; Natasha Hurley-Walker; Anthony N. Lasenby; Malak Olamaie; Guy G. Pooley; Carmen Rodríguez-Gonzálvez; Richard D. E. Saunders; Michel Schammel; Paul F. Scott; Timothy Shimwell; David Titterington; Elizabeth Waldram; Jonathan T. L. Zwart

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We perform deep 1.8 cm radio continuum imaging towards thirteen protostellar regions selected from the Spitzer c2d small clouds and cores programme at high resolution (25") in order to detect and quantify the cm-wave emission from deeply embedded young protostars. Within these regions we detect fifteen compact radio sources which we identify as radio protostars including two probable new detections. The sample is in general of low bolometric luminosity and contains several of the newly...
Source: http://arxiv.org/abs/1009.0348v1

Arxiv.org

66 66

AMI-LA radio continuum observations of Spitzer c2d small clouds and cores: Serpens region

Sep 23, 2013 09/13

by Anna M. M. Scaife; Jennifer Hatchell; Rachael E. Ainsworth; Jane V. Buckle; Matthew Davies; Thomas M. O. Franzen; Keith J. B. Grainge; Michael P. Hobson; Natasha Hurley-Walker; Anthony N. Lasenby; Malak Olamaie; Yvette C. Perrott; Guy G. Pooley; John S. Richer; Carmen Rodriguez-Gonzalvez; Richard D. E. Saunders; Michel P. Schammel; Paul F. Scott; Timothy Shimwell; David Titterington; Elizabeth Waldram

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We present deep radio continuum observations of the cores identified as deeply embedded young stellar objects in the Serpens molecular cloud by the Spitzer c2d programme at a wavelength of 1.8cm with the Arcminute Microkelvin Imager Large Array (AMI-LA). These observations have a resolution of ~30arcsec and an average sensitivity of 19microJy/beam. The targets are predominantly Class I sources, and we find the detection rate for Class I objects in this sample to be low (18%) compared to that of...
Source: http://arxiv.org/abs/1110.0941v1

Arxiv.org

64 64

AMI SZ observations and Bayesian analysis of a sample of six redshift-one clusters of galaxies

Sep 22, 2013 09/13

by AMI Consortium; :; Michel P. Schammel; Farhan Feroz; Keith J. B. Grainge; Michael P. Hobson; Natasha Hurley-Walker; Anthony N. Lasenby; Malak Olamaie; Yvette C. Perrott; Guy G. Pooley; Carmen Rodriguez-Gonzalvez; Clare Rumsey; Richard D. E. Saunders; Paul F. Scott; Timothy W. Shimwell; David J. Titterington; Elizabeth M. Waldram

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We present 16-GHz Sunyaev-Zel'dovich observations using the Arcminute Microkelvin Imager (AMI) and subsequent Bayesian analysis of six galaxy clusters at redshift ($z \approx 1$) chosen from an X-ray and Infrared selected sample from Culverhouse et al. (2010). In the subsequent analysis we use two cluster models, an isothermal \beta-model and a Dark Matter GNFW (DM-GNFW) model in order to derive a formal detection probability and the cluster parameters. We detect two clusters (CLJ1415+3612...
Source: http://arxiv.org/abs/1210.7771v2

Arxiv.org

49 49

Cosmological parameter estimation and Bayesian model comparison using VSA data

Sep 18, 2013 09/13

by Anze Slosar; Pedro Carreira; Kieran Cleary; Rod D. Davies; Richard J. Davis; Clive Dickinson; Ricardo Genova-Santos; Keith Grainge; Carlos M. Gutierrez; Yaser A. Hafez; Michael P. Hobson; Michael E. Jones; Rudiger Kneissl; Katy Lancaster; Anthony Lasenby; J. P. Leahy; Klaus Maisinger; Phil J. Marshall; Guy G. Pooley; Rafael Rebolo; Jose Alberto Rubino-Martin; Ben Rusholme; Richard D. E. Saunders; Richard Savage; Paul F. Scott; Pedro J. Sosa Molina; Angela C. Taylor; David Titterington; Elizabeth Waldram; Robert A. Watson; Althea Wilkinson

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We constrain the basic comological parameters using the first observations by the Very Small Array (VSA) in its extended configuration, together with existing cosmic microwave background data and other cosmological observations. We estimate cosmological parameters for four different models of increasing complexity. In each case, careful consideration is given to implied priors and the Bayesian evidence is calculated in order to perform model selection. We find that the data are most...
Source: http://arxiv.org/abs/astro-ph/0212497v2

Arxiv.org

34 34

VSA Observations of the Anomalous Microwave Emission in the Perseus Region

Sep 19, 2013 09/13

by Christopher T. Tibbs; Robert A. Watson; Clive Dickinson; Rodney D. Davies; Richard J. Davis; Carlos del Burgo; Thomas M. O. Franzen; Ricardo Génova-Santos; Keith Grainge; Michael P. Hobson; Carmen P. Padilla-Torres; Rafael Rebolo; Jóse Alberto Rubiño-Martín; Richard D. E. Saunders; Anna M. M. Scaife; Paul F. Scott

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The dust feature G159.6--18.5 in the Perseus region has previously been observed with the COSMOSOMAS experiment \citep{Watson:05} on angular scales of $\approx$ 1$^{\circ}$, and was found to exhibit anomalous microwave emission. We present new observations of this dust feature, performed with the Very Small Array (VSA) at 33 GHz, to help increase the understanding of the nature of this anomalous emission. On the angular scales observed with the VSA ($\approx$ 10 -- 40$^{\prime}$), G159.6--18.5...
Source: http://arxiv.org/abs/0909.4682v1

Arxiv.org

98 98

Radio source calibration for the VSA and other CMB instruments at around 30 GHz

Jul 20, 2013 07/13

by Yaser A. Hafez; Rod D. Davies; Richard J. Davis; Clive Dickinson; Elia S. Battistelli; Francisco Blanco; Kieran Cleary; Thomas Franzen; Ricardo Genova-Santos; Keith Grainge; Michael P. Hobson; Michael E. Jones; Katy Lancaster; Anthony N. Lasenby; Carmen P. Padilla-Torres; Jose Alberto Rubino-Martin; Rafael Rebolo; Richard D. E. Saunders; Paul F. Scott; Angela C. Taylor; David Titterington; Marco Tucci; Robert A. Watson

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Accurate calibration of data is essential for the current generation of CMB experiments. Using data from the Very Small Array (VSA), we describe procedures which will lead to an accuracy of 1 percent or better for experiments such as the VSA and CBI. Particular attention is paid to the stability of the receiver systems, the quality of the site and frequent observations of reference sources. At 30 GHz the careful correction for atmospheric emission and absorption is shown to be essential for...
Source: http://arxiv.org/abs/0804.2853v1

Books to Borrow

1 1.0

Toward sustainable federalism : reforming federal-provincial fiscal arrangements

Apr 22, 2019 04/19

by Hobson, Paul A. R. (Paul Alexander Robert), 1953-

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v, 82 p. : 23 cm
Topic: Federal-provincial fiscal relations -- Canada

Arxiv.org

48 48

Searching for non-Gaussianity in the VSA data

Sep 22, 2013 09/13

by Richard Savage; Richard A. Battye; Pedro Carreira; Kieran Cleary; Rod D. Davies; Richard J. Davis; Clive Dickinson; Ricardo Genova-Santos; Keith Grainge; Carlos M. Gutierrez; Yaser A. Hafez; Michael P. Hobson; Michael E. Jones; Rudiger Kneissl; Katy Lancaster; Anthony Lasenby; J. P. Leahy; Klaus Maisinger; Guy G. Pooley; Nutan Rajguru; Rafael Rebolo; Graca Rocha; Jose Alberto Rubino-Martin; Pedro Sosa Molina; Richard D. E. Saunders; Paul Scott; Anze Slosar; Angela C. Taylor; David Titterington; Elizabeth Waldram; Robert A. Watson

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We have tested Very Small Array (VSA) observations of three regions of sky for the presence of non-Gaussianity, using high-order cumulants, Minkowski functionals, a wavelet-based test and a Bayesian joint power spectrum/non-Gaussianity analysis. We find the data from two regions to be consistent with Gaussianity. In the third region, we obtain a 96.7% detection of non-Gaussianity using the wavelet test. We perform simulations to characterise the tests, and conclude that this is consistent with...
Source: http://arxiv.org/abs/astro-ph/0308266v2

Arxiv.org

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First results from the Very Small Array -- I. Observational methods

Sep 22, 2013 09/13

by Robert A. Watson; Pedro Carreira; Kieran Cleary; Rod D. Davies; Richard J. Davis; Clive Dickinson; Keith Grainge; Carlos M. Gutierrez; Michael P. Hobson; Michael E. Jones; Rudiger Kneissl; Anthony Lasenby; Klaus Maisinger; Guy G. Pooley; Rafael Rebolo; Jose Alberto Rubino-Martin; Ben Rusholme; Richard D. E. Saunders; Richard Savage; Paul F. Scott; Anze Slosar; Pedro J. Sosa Molina; Angela C. Taylor; David Titterington; Elizabeth Waldram; Althea Wilkinson

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The Very Small Array (VSA) is a synthesis telescope designed to image faint structures in the cosmic microwave background on degree and sub-degree angular scales. The VSA has key differences from other CMB interferometers with the result that different systematic errors are expected. We have tested the operation of the VSA with a variety of blank-field and calibrator observations and cross-checked its calibration scale against independent measurements. We find that systematic effects can be...
Source: http://arxiv.org/abs/astro-ph/0205378v2

Arxiv.org

31 31

First results from the Very Small Array -- III. The CMB power spectrum

Sep 22, 2013 09/13

by Paul F. Scott; Pedro Carreira; Kieran Cleary; Rod D. Davies; Richard Davis; Clive Dickinson; Keith Grainge; Carlos Gutierrez; Michael P. Hobson; Michael E. Jones; Ruediger Kneissl; Anthony Lasenby; Klaus Maisinger; Guy Pooley; Rafael Rebolo; Jose Alberto Rubino Martin; Pedro Sosa Molina; Ben Rusholme; Richard Saunders; Richard Savage; Anze Slosar; Angela C. Taylor; David Titterington; Elizabeth Waldram; Robert A. Watson; Althea Wilkinson

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We present the power spectrum of the fluctuations in the cosmic microwave background detected by the Very Small Array (VSA) in its first season of observations in its compact configuration. We find clear detections of first and second acoustic peaks at l~200 and l~550, plus detection of power on scales up to l=800. The VSA power spectrum is in very good agreement with the results of the Boomerang, Dasi and Maxima telescopes despite the differing potential systematic errors.
Source: http://arxiv.org/abs/astro-ph/0205380v3

Arxiv.org

97 97

Non-Gaussianity in the Very Small Array CMB maps with Smooth-Goodness-of-fit tests

Jul 20, 2013 07/13

by Jose Alberto Rubino-Martin; Antonio M. Aliaga; R. B. Barreiro; Richard A. Battye; Pedro Carreira; Kieran Cleary; Rod D. Davies; Richard J. Davis; Clive Dickinson; Ricardo Genova-Santos; Keith Grainge; Carlos M. Gutierrez; Yaser A. Hafez; Michael P. Hobson; Michael E. Jones; Rudiger Kneissl; Katy Lancaster; Anthony Lasenby; J. P. Leahy; Klaus Maisinger; Enrique Martinez-Gonzalez; Guy G. Pooley; Nutan Rajguru; Rafael Rebolo; Jose Luis Sanz; Richard D. E. Saunders; Richard S. Savage; Anna Scaife; Paul Scott; Anze Slosar; Angela C. Taylor; David Titterington; Elizabeth Waldram; Robert A. Watson

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(Abridged) We have used the Rayner & Best (1989) smooth tests of goodness-of-fit to study the Gaussianity of the Very Small Array (VSA) data. Out of the 41 published VSA individual pointings dedicated to cosmological observations, 37 are found to be consistent with Gaussianity, whereas four pointings show deviations from Gaussianity. In two of them, these deviations can be explained as residual systematic effects of a few visibility points which, when corrected, have a negligible impact on...
Source: http://arxiv.org/abs/astro-ph/0604070v1

Arxiv.org

67 67

AMI radio continuum observations of young stellar objects with known outflows

Jul 20, 2013 07/13

by AMI Consortium; :; Rachael E. Ainsworth; Anna M. M. Scaife; Tom P. Ray; Jane V. Buckle; Matthew Davies; Thomas M. O. Franzen; Keith J. B. Grainge; Michael P. Hobson; Natasha Hurley-Walker; Anthony N. Lasenby; Malak Olamaie; Yvette C. Perrott; Guy G. Pooley; John S. Richer; Carmen Rodriguez-Gonzalvez; Michel P. Schammel; Paul F. Scott; Timothy Shimwell; Richard D. E. Saunders; David Titterington; Elizabeth Waldram

eye 67

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We present 16 GHz (1.9 cm) deep radio continuum observations made with the Arcminute Microkelvin Imager (AMI) of a sample of low-mass young stars driving jets. We combine these new data with archival information from an extensive literature search to examine spectral energy distributions (SEDs) for each source and calculate both the radio and sub-mm spectral indices in two different scenarios: (1) fixing the dust temperature (Td) according to evolutionary class; (2) allowing Td to vary. We use...
Source: http://arxiv.org/abs/1203.3381v1

Arxiv.org

36 36

Constraints on spinning dust towards Galactic targets with the VSA: a tentative detection of excess microwave emission towards 3C396

Sep 22, 2013 09/13

by Anna Scaife; David A. Green; Richard A. Battye; Rod D. Davies; Richard J. Davis; Clive Dickinson; Thomas Franzen; Ricardo Genova-Santos; Keith Grainge; Yaser A. Hafez; Michael P. Hobson; Anthony Lasenby; Guy G. Pooley; Nutan Rajguru; Rafael Rebolo; Jose Alberto Rubino-Martin; Richard D. E. Saunders; Paul F. Scott; David Titterington; Elizabeth Waldram; Robert A. Watson

eye 36

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We present results from observations made at 33 GHz with the Very Small Array (VSA) telescope towards potential candidates in the Galactic plane for spinning dust emission. In the cases of the diffuse HII regions LPH96 and NRAO591 we find no evidence for anomalous emission and, in combination with Effelsberg data at 1.4 and 2.7 GHz, confirm that their spectra are consistent with optically thin free--free emission. In the case of the infra-red bright SNR 3C396 we find emission inconsistent with...
Source: http://arxiv.org/abs/astro-ph/0702473v1

Arxiv.org

53 53

AMI observations of Lynds Dark Nebulae: further evidence for anomalous cm-wave emission

Sep 22, 2013 09/13

by Anna M. M. Scaife; Natasha Hurley-Walker; David A. Green; Matthew L. Davies; Thomas M. O. Franzen; Keith J. B. Grainge; Michael P. Hobson; Anthony N. Lasenby; Guy G. Pooley; Carmen Rodriguez-Gonzalvez; Richard D. E. Saunders; Paul F. Scott; Timothy W. Shimwell; David J. Titterington; Elizabeth M. Waldram; Jonathan T. L. Zwart

eye 53

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Observations at 14.2 to 17.9 GHz made with the AMI Small Array towards fourteen Lynds Dark Nebulae with a resolution of 2' are reported. These sources are selected from the SCUBA observations of Visser et al. (2001) as small angular diameter clouds well matched to the synthesized beam of the AMI Small Array. Comparison of the AMI observations with radio observations at lower frequencies with matched uv-plane coverage is made, in order to search for any anomalous excess emission which can be...
Source: http://arxiv.org/abs/0908.1655v1

Arxiv.org

43 43

First results from the Very Small Array -- II. Observations of the CMB

Sep 22, 2013 09/13

by Angela C. Taylor; Pedro Carreira; Kieran Cleary; Rod D. Davies; Richard J. Davis; Clive Dickinson; Keith Grainge; Carlos M. Gutierrez; Michael P. Hobson; Michael E. Jones; Rudiger Kneissl; Anthony Lasenby; J. P. Leahy; Klaus Maisinger; Guy G. Pooley; Rafael Rebolo; Jose Alberto Rubino-Martin; Ben Rusholme; Richard D. E. Saunders; Richard Savage; Paul F. Scott; Anze Slosar; Pedro J. Sosa Molina; David Titterington; Elizabeth Waldram; Robert A. Watson; Althea Wilkinson

eye 43

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We have observed the cosmic microwave background temperature fluctuations in eight fields covering three separated areas of sky with the Very Small Array at 34 GHz. A total area of 101 square degrees has been imaged, with sensitivity on angular scales 3.6 - 0.4 degrees (equivalent to angular multipoles l=150-900). We describe the field selection and observing strategy for these observations. In the full-resolution images (with synthesised beam of FWHM ~ 17 arcmin) the thermal noise is typically...
Source: http://arxiv.org/abs/astro-ph/0205381v2

Arxiv.org

35 35

Parameterization Effects in the analysis of AMI Sunyaev-Zel'dovich Observations

Sep 23, 2013 09/13

by The AMI Consortium; :; Malak Olamaie; Carmen Rodriguez-Gonzalvez; Matthew L. Davies; Farhan Feroz; Thomas M. O. Franzen; Keith J. B. Grainge; Michael P. Hobson; Natasha Hurley-Walker; Anthony N. Lasenby; Guy G. Pooley; Richard D. E. Saunders; Anna M. M. Scaife; Michel Schammel; Paul F. Scott; Timothy W. Shimwell; David J. Titterington; Elizabeth M. Waldram; Jonathan T. L. Zwart

eye 35

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Most Sunyaev--Zel'dovich (SZ) and X-ray analyses of galaxy clusters try to constrain the cluster total mass and/or gas mass using parameterised models and assumptions of spherical symmetry and hydrostatic equilibrium. By numerically exploring the probability distributions of the cluster parameters given the simulated interferometric SZ data in the context of Bayesian methods, and assuming a beta-model for the electron number density we investigate the capability of this model and analysis to...
Source: http://arxiv.org/abs/1012.4996v2

Arxiv.org

37 37

10C Survey of Radio Sources at 15.7 GHz: II - First Results

Sep 23, 2013 09/13

by Matthew L. Davies; Thomas M. O. Franzen; Elizabeth M. Waldram; Keith J. B. Grainge; Michael P. Hobson; Natasha Hurley-Walker; Anthony Lasenby; Malak Olamaie; Guy G. Pooley; Julia M. Riley; Carmen Rodriguez-Gonzalvez; Richard D. E. Saunders; Anna M. M. Scaife; Michel P. Schammel; Paul F. Scott; Timothy W. Shimwell; David J. Titterington; Jonathan T. L. Zwart

eye 37

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The first results from the Tenth Cambridge (10C) Survey of Radio Sources, carried out using the AMI Large Array (LA) at an observing frequency of 15.7 GHz, are presented. The survey fields cover an area of approximately 27 sq. degrees to a flux-density completeness of 1 mJy. Results for some deeper areas, covering approximately 12 sq. degrees, wholly contained within the total areas and complete to 0.5 mJy, are also presented. The completeness for both areas is estimated to be at least 93 per...
Source: http://arxiv.org/abs/1012.3659v2

Arxiv.org

47 47

AMI observations of northern supernova remnants at 14-18 GHz

Sep 21, 2013 09/13

by Natasha Hurley-Walker; A. M. M. Scaife; D. A. Green; Matthew L. Davies; Keith Grainge; Michael P. Hobson; Michael E. Jones; Tak Kaneko; Anthony Lasenby; Guy Pooley; Richard D. E. Saunders; Paul F. Scott; David Titterington; Elizabeth Waldram; Jonathan T. L. Zwart

eye 47

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We present observations between 14.2 and 17.9 GHz of 12 reported supernova remnants (SNRs) made with the Arcminute Microkelvin Imager Small Array (AMI SA). In conjunction with data from the literature at lower radio frequencies, we determine spectra of these objects. For well-studied SNRs (Cas A, Tycho's SNR, 3C58 and the Crab Nebula), the results are in good agreement with spectra based on previous results. For the less well-studied remnants the AMI SA observations provide higher-frequency...
Source: http://arxiv.org/abs/0902.1420v1

Arxiv.org

54 54

Sunyaev-Zel'dovich observation of the Bullet-like cluster Abell 2146 with the Arcminute Microkelvin Imager

Sep 21, 2013 09/13

by Carmen Rodriguez-Gonzalvez; Malak Olamaie; Matthew L. Davies; Andy C. Fabian; Farhan Feroz; Thomas M. O. Franzen; Keith J. B. Grainge; Michael P. Hobson; Natasha Hurley-Walker; Anthony N. Lasenby; Guy G. Pooley; Helen R. Russell; Jeremy S. Sanders; Richard D. E. Saunders; Anna M. M. Scaife; Michel P. Schammel; Paul F. Scott; Timothy W. Shimwell; David J. Titterington; Elizabeth M. Waldram; Jonathan T. L. Zwart

eye 54

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We present 13.9-18.2 GHz observations of the Sunyaev-Zel'dovich (SZ) effect towards Abell 2146 using the Arcminute Microkelvin Imager (AMI). The cluster is detected with a peak SNR ratio of 13 sigma in the radio source subtracted map. Comparison of the SZ and X-ray images suggests that they both have extended regions which lie approximately perpendicular to one another, with their emission peaks significantly displaced. These features indicate non-uniformities in the distributions of the gas...
Source: http://arxiv.org/abs/1011.0325v2

Arxiv.org

39 39

Bayesian analysis of weak gravitational lensing and Sunyaev-Zel'dovich data for six galaxy clusters

Sep 22, 2013 09/13

by Natasha Hurley-Walker; Sarah Bridle; Eduardo S. Cypriano; Matthew L. Davies; Thomas Erben; Farhan Feroz; Thomas M. O. Franzen; Keith Grainge; Michael P. Hobson; Anthony Lasenby; P. J. Marshall; Malak Olamaie; Guy Pooley; Carmen Rodríguez-Gonzálvez; Richard D. E. Saunders; Anna M. M. Scaife; Michel P. Schammel; Paul F. Scott; Timothy Shimwell; David Titterington; Elizabeth Waldram; Jonathan T. L. Zwart

eye 39

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We present an analysis of observations made with the Arcminute Microkelvin Imager (AMI) and the Canada-France-Hawaii Telescope (CFHT) of six galaxy clusters in a redshift range of 0.16--0.41. The cluster gas is modelled using the Sunyaev--Zel'dovich (SZ) data provided by AMI, while the total mass is modelled using the lensing data from the CFHT. In this paper, we: i) find very good agreement between SZ measurements (assuming large-scale virialisation and a gas-fraction prior) and lensing...
Source: http://arxiv.org/abs/1101.5912v3

Arxiv.org

49 49

Radio continuum observations of Class I protostellar disks in Taurus: constraining the greybody tail at centimetre wavelengths

Sep 23, 2013 09/13

by Anna M. M. Scaife; Jane V. Buckle; Rachael E. Ainsworth; Matthew Davies; Thomas M. O. Franzen; Keith J. B. Grainge; Michael P. Hobson; Natasha Hurley-Walker; Anthony N. Lasenby; Malak Olamaie; Yvette C. Perrott; Guy G. Pooley; Tom P. Ray; John S. Richer; Carmen Rodriguez-Gonzalvez; Richard D. E. Saunders; Michel P. Schammel; Paul F. Scott; Timothy Shimwell; David Titterington; Elizabeth Waldram

eye 49

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We present deep 1.8 cm (16 GHz) radio continuum imaging of seven young stellar objects in the Taurus molecular cloud. These objects have previously been extensively studied in the sub-mm to NIR range and their SEDs modelled to provide reliable physical and geometrical parametres.We use this new data to constrain the properties of the long-wavelength tail of the greybody spectrum, which is expected to be dominated by emission from large dust grains in the protostellar disk. We find spectra...
Source: http://arxiv.org/abs/1111.5184v1

Arxiv.org

45 45

Hyper-efficient model-independent Bayesian method for the analysis of pulsar timing data

Sep 22, 2013 09/13

by Lindley Lentati; Paul Alexander; Michael P. Hobson; Stephen Taylor; Jonathon Gair; Sreekumar T. Balan; Rutger van Haasteren

eye 45

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A new model independent method is presented for the analysis of pulsar timing data and the estimation of the spectral properties of an isotropic gravitational wave background (GWB). We show that by rephrasing the likelihood we are able to eliminate the most costly aspects of computation normally associated with this type of data analysis. When applied to the International Pulsar Timing Array Mock Data Challenge data sets this results in speedups of approximately 2 to 3 orders of magnitude...
Source: http://arxiv.org/abs/1210.3578v2

Arxiv.org

49 49

Sunyaev-Zel'dovich observations of LoCuSS clusters with the Arcminute Microkelvin Imager: high X-ray luminosity sample

Sep 22, 2013 09/13

by The AMI Consortium; :; Timothy W. Shimwell; Carmen Rodriguez-Gonzalvez; Matthew L. Davies; Farhan Feroz; Thomas M. O. Franzen; Keith J. B. Grainge; Michael P. Hobson; Natasha Hurley-Walker; Anthony N. Lasenby; Malak Olamaie; Guy Pooley; Richard D. E. Saunders; Anna M. M. Scaife; Michel P. Schammel; Paul F. Scott; David J. Titterington; Elizabeth M. Waldram

eye 49

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We present observations from the Small Array of the Arcminute Microkelvin Imager (AMI) of eight high X-ray luminosity galaxy cluster systems selected from the Local Cluster Substructure Survey (LoCuSS) sample.We detect the Sunyaev-Zel'dovich (SZ) effect in seven of these clusters. With the assumptions that galaxy clusters are isothermal, have a density profile described by a spherical b -model and obey the theoretical M-T relation, we are able to derive cluster parameters at r200 from our SZ...
Source: http://arxiv.org/abs/1101.5590v1

Arxiv.org

38 38

Observations of the Corona Borealis supercluster with the superextended Very Small Array: further constraints on the nature of the non-Gaussian CMB cold spot

Jul 20, 2013 07/13

by Ricardo Genova-Santos; Jose Alberto Rubino-Martin; Rafael Rebolo; Richard A. Battye; Francisco Blanco; Rod D. Davies; Richard J. Davis; Thomas Franzen; Keith Grainge; Michael P. Hobson; Anthony Lasenby; Carmen P. Padilla-Torres; Guy G. Pooley; Richard D. E. Saunders; Anna Scaife; Paul F. Scott; David Titterington; Marco Tucci; Robert A. Watson

eye 38

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We present interferometric imaging at 33 GHz, with the new superextended configuration of the Very Small Array (VSA), of a very deep decrement in the cosmic microwave background (CMB) temperature. This decrement is located in the direction of the Corona Borealis supercluster, at a position with no known galaxy clusters, and was discovered by a previous VSA survey (Genova-Santos et al.). A total area of 3 sq.deg. has now been imaged, with an angular resolution of 7 arcmin and a flux sensitivity...
Source: http://arxiv.org/abs/0804.0199v1

Arxiv.org

57 57

High sensitivity measurements of the CMB power spectrum with the extended Very Small Array

Sep 21, 2013 09/13

by Clive Dickinson; Richard A. Battye; Kieran Cleary; Rod D. Davies; Richard J. Davis; Ricardo Genova-Santos; Keith Grainge; Carlos M. Gutierrez; Yaser A. Hafez; Michael P. Hobson; Michael E. Jones; Rudiger Kneissl; Katy Lancaster; Anthony Lasenby; J. P. Leahy; Klaus Maisinger; Carolina Odman; Guy Pooley; Nutan Rajguru; Rafael Rebolo; Jose Alberto Rubino-Martin; Richard D. E. Saunders; Richard S. Savage; Anna Scaife; Paul F. Scott; Anze Slosar; Pedro Sosa Molina; Angela C. Taylor; David Titterington; Elizabeth Waldram; Robert A. Watson; Althea Wilkinson

eye 57

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We present deep Ka-band ($\nu \approx 33$ GHz) observations of the CMB made with the extended Very Small Array (VSA). This configuration produces a naturally weighted synthesized FWHM beamwidth of $\sim 11$ arcmin which covers an $\ell$-range of 300 to 1500. On these scales, foreground extragalactic sources can be a major source of contamination to the CMB anisotropy. This problem has been alleviated by identifying sources at 15 GHz with the Ryle Telescope and then monitoring these sources at...
Source: http://arxiv.org/abs/astro-ph/0402498v2

Boston Public Library

159 159

Boston, a state of mind : an exhibition record

Dec 15, 2015 12/15

by Hobson, Barbara Meil; Wright, Paul M., joint author; Boston Public Library

eye 159

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Held April 1975-Dec. 1976 at the Boston Public Library
Topic: American literature

Arxiv.org

72 72

Detailed SZ study of 19 LoCuSS galaxy clusters: masses and temperatures out to the virial radius

Sep 20, 2013 09/13

by The AMI Consortium; :; Carmen Rodríguez-Gonzálvez; Timothy W. Shimwell; Matthew L. Davies; Farhan Feroz; Thomas M. O. Franzen; Keith J. B. Grainge; Michael P. Hobson; Natasha Hurley-Walker; Anthony N. Lasenby; Malak Olamaie; Guy Pooley; Richard D. E. Saunders; Anna M. M. Scaife; Michel P. Schammel; Paul F. Scott; David J. Titterington; Elizabeth M. Waldram

eye 72

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We present 16-GHz AMI SZ observations of 19 clusters with L_X >7x10^37 W (h50=1) selected from the LoCuS survey (0.142
Source: http://arxiv.org/abs/1205.7067v1

Arxiv.org

49 49

First results from the Very Small Array -- IV. Cosmological parameter estimation

Sep 24, 2013 09/13

by Jose Alberto Rubino-Martin; Rafael Rebolo; Pedro Carreira; Kieran Cleary; Rod D. Davies; Richard J. Davis; Clive Dickinson; Keith Grainge; Carlos M. Gutierrez; Michael P. Hobson; Michael E. Jones; Rudiger Kneissl; Anthony Lasenby; Klaus Maisinger; Carolina Oedman; Guy G. Pooley; Pedro J. Sosa Molina; Ben Rusholme; Richard D. E. Saunders; Richard Savage; Paul F. Scott; Anze Slosar; Angela C. Taylor; David Titterington; Elizabeth Waldram; Robert A. Watson; Althea Wilkinson

eye 49

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We investigate the constraints on basic cosmological parameters set by the first compact-configuration observations of the Very Small Array (VSA), and other cosmological data sets, in the standard inflationary LambdaCDM model. Using a weak prior 40 < H_0 < 90 km/s/Mpc and 0 < tau < 0.5 we find that the VSA and COBE_DMR data alone produce the constraints Omega_tot = 1.03^{+0.12}_{-0.12}, Omega_bh^2 = 0.029^{+0.009}_{-0.009}, Omega_cdm h^2 = 0.13^{+0.08}_{-0.05} and n_s =...
Source: http://arxiv.org/abs/astro-ph/0205367v2

Arxiv.org

26 26

High resolution AMI Large Array imaging of spinning dust sources: spatially correlated 8 micron emission and evidence of a stellar wind in L675

Sep 19, 2013 09/13

by Anna M. M. Scaife; David A. Green; Guy G. Pooley; Matthew L. Davies; Thomas M. O. Franzen; Keith J. B. Grainge; Michael P. Hobson; Natasha Hurley-Walker; Anthony N. Lasenby; Malak Olamaie; John S. Richer; Carmen Rodriguez-Gonzalvez; Richard D. E. Saunders; Paul F. Scott; Timothy W. Shimwell; David J. Titterington; Elizabeth M. Waldram; Jonathan T. L. Zwart

eye 26

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We present 25 arcsecond resolution radio images of five Lynds Dark Nebulae (L675, L944, L1103, L1111 & L1246) at 16 GHz made with the Arcminute Microkelvin Imager (AMI) Large Array. These objects were previously observed with the AMI Small Array to have an excess of emission at microwave frequencies relative to lower frequency radio data. In L675 we find a flat spectrum compact radio counterpart to the 850 micron emission seen with SCUBA and suggest that it is cm-wave emission from a...
Source: http://arxiv.org/abs/0910.4011v2

Arxiv.org

47 47

Further Sunyaev-Zel'dovich observations of two Planck ERCSC clusters with the Arcminute Microkelvin Imager

Sep 22, 2013 09/13

by The AMI Consortium; :; Natasha Hurley-Walker; Michael L. Brown; Matthew L. Davies; Farhan Feroz; Thomas M. O. Franzen; Keith Grainge; Michael P. Hobson; Anthony Lasenby; Malak Olamaie; Guy Pooley; Carmen Rodriguez-Gonzalvez; Richard D. E. Saunders; Michel P. Schammel; Anna M. M. Scaife; Paul F. Scott; Timothy Shimwell; David Titterington; Elizabeth Waldram

eye 47

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We present follow-up observations of two galaxy clusters detected blindly via the Sunyaev-Zel'dovich (SZ) effect and released in the Planck Early Release Compact Source Catalogue. We use the Arcminute Microkelvin Imager, a dual-array 14-18 GHz radio interferometer. After radio source subtraction, we find a SZ decrement of integrated flux density -1.08+/-0.10 mJy toward PLCKESZ G121.11+57.01, and improve the position measurement of the cluster, finding the centre to be RA 12 59 36.4, Dec +60 04...
Source: http://arxiv.org/abs/1103.0947v2

Arxiv.org

39 39

AMI observations of unmatched Planck ERCSC LFI sources at 15.75 GHz

Sep 23, 2013 09/13

by AMI Consortium; :; Yvette C. Perrott; David A. Green; Matthew L. Davies; Thomas M. O. Franzen; Keith J. B. Grainge; Michael P. Hobson; Natasha Hurley-Walker; Anthony N. Lasenby; Malak Olamaie; Guy G. Pooley; Carmen Rodríguez-Gonzálvez; Richard D. E. Saunders; Anna M. M. Scaife; Michel P. Schammel; Paul F. Scott; Timothy W. Shimwell; David J. Titterington; Elizabeth M. Waldram

eye 39

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The Planck Early Release Compact Source Catalogue includes 26 sources with no obvious matches in other radio catalogues (of primarily extragalactic sources). Here we present observations made with the Arcminute Microkelvin Imager Small Array (AMI SA) at 15.75 GHz of the eight of the unmatched sources at declination > +10 degrees. Of the eight, four are detected and are associated with known objects. The other four are not detected with the AMI SA, and are thought to be spurious.
Source: http://arxiv.org/abs/1110.1454v2

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